import com.mysql.jdbc.jdbc2.optional.MysqlDataSource;

import javax.sql.DataSource;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.Scanner;

/**
 * Created with IntelliJ IDEA.
 * Description:
 * User: 28779
 * Date: 2023-08-08
 * Time: 15:23
 */
public class JDBC_Demo3 {
    public static void main(String[] args) throws SQLException {

/*        Scanner scanner = new Scanner(System.in);
        System.out.println("输入要查询的id:");
        int studentId =  scanner.nextInt();*/

        DataSource dataSource = new MysqlDataSource();
        ((MysqlDataSource)dataSource).setUrl("jdbc:mysql://127.0.0.1:3306/java1?characterEncoding=utf8&useSSL=false");
        ((MysqlDataSource)dataSource).setUser("root");
        ((MysqlDataSource)dataSource).setPassword("111111");

        Connection connection = dataSource.getConnection();

        //String sql = "select * from class where id = ?";
        String sql = "select * from class ";
        PreparedStatement statement = connection.prepareStatement(sql);
        //statement.setInt(1,studentId);

        ResultSet resultSet = statement.executeQuery();

        while(resultSet.next()) {
            int id = resultSet.getInt("id");
            String name = resultSet.getString("name");
            System.out.println("id:" + id + " name:" + name );
        }

        resultSet.close();
        statement.close();
        connection.close();
    }
}
